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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-90156

ksmbd: safely discard unregistered deferred locks

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: safely discard unregistered deferred locks When vfs_lock_file() defers a lock, smb2_lock() puts its ksmbd_lock on rollback_list before allocating and registering the asynchronous work. If either operation fails, rollback assumes that smb_lock->conn is initialized and dereferences NULL. The deferred file_lock also remains linked into the VFS blocked-lock state while it is freed. Keep the lock off rollback_list until async setup succeeds. On setup failures, explicitly unblock and wake the deferred lock before freeing it and its ksmbd wrapper.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < aaa51ac0d934cb4e2ab96e150fccc934e822009baffected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < ecdcfa15b3d799476c685cecd433ebefc93015c8affected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 77413400f083a959724de6f36348c9677ef9873aaffected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 52b91bc5253bb83665f3ea70565d0b2487dae643affected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < d09af9a35ff7b77a950b507133d9092aadbfeff4affected
  • e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to < 054bcca4cd9f00719b01f7108b51a2168fb94f15affected

Linux Linux

Default version status: affected

  • 5.15affected
  • 0 to < 5.15unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.114 to ≤ 6.12.*unaffected
  • 6.18.57 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References